Global Tropics Hazards And Benefits Outlook
Transcript of Global Tropics Hazards And Benefits Outlook
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Global Tropics Hazards And Benefits Outlook August 25, 2015
Jon Gottschalck
Outline
1. Review of Recent Conditions 2. Synopsis of Climate Modes 3. GTH Outlook and Forecast Discussion 4. Connections to U.S. Impacts
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Week-1 Week-2
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Tropical Cyclone Verification
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ENSO: • Current: El Niño Advisory
• Outlook: There is a greater than 90% chance that El Niño will continue through Northern Hemisphere winter 2015-16, and around an 85% chance it will last into early spring 2016. MJO and other subseasonal tropical variability: • The MJO is incoherent and not anticipated to play a role in the global tropical convective pattern. • Dynamical model MJO Index forecasts indicate little coherent consistent signal, with ensemble members falling into almost every Phase during the next two weeks. This is reflective of the lack of a coherent subseasonal signal. • Even other types of subseasonal tropical variability are currently not impressive • El Niño and tropical cyclone activity are anticipated to be the primary drivers of tropical convective patterns during the next two weeks. Extratropics: • Amplified mid-latitude pattern in part due to recurving West Pacific tropical cyclones interfering with any El Nino mid-latitude response.
Synopsis of Climate Modes
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IR Satellite & 200-hpa Velocity Potential Anomalies
Green: Enhanced Divergence Brown: Enhanced Convergence
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MJO Observation/Forecast
GFS ECMWF UKMET
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Atlantic Basin
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PacificBasin
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Days 1-4
Day 5-8
Day 9-12
Day 13-15
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Week 2 – Temperature and Precipitation
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